Long story short: a few months ago several gallons of extremely briny water (out of the water softener) ended up on the floor of our basement. We mopped it all up at the time it happened, but the problem is that apparently the salt has soaked deeply into the concrete and keeps coming up. We vacuum and sponge mop it whenever it occurs but now the hot water heater and base of the furnace are starting to show signs of rust/corrosion. What can I do to ensure the salt does not do further damage? My father suggested sponge mopping with a vinegar solution - (the rationale being salt is a base and vinegar is an acid so they should neutralize, but that didn't seem to work. I wondered if maybe I covered it with a latex paint it might contain or encapsulate the salt.